Cubs 'W' Flag Has Long History Beyond Wrigley Field - CBS Chicago

How Long Should You Fly The W Flag After A Cubs Win? - Wrigleyville - Chicago - DNAinfo

History behind the Chicago Cubs 'W' flag - ABC7 Chicago

Chicago Cubs present Obama with 'best swag' during White House visit

Vintage Chicago Tribune: How Wrigley Field got lights and why Cubs fans had to wait past 8-8-88 to raise 'W' flag

Flying The “W”. The History of the Iconic Cubs “W” Flag…, by Doug Preszler, Wrigley Rapport

The Cubs have updated their team flag - Bleed Cubbie Blue

Cubs: Beth Mowins makes Chicago Cubs broadcast history